Thanks for the ongoing replies. Based on matching part numbers I've established that both my own ECU and the potential purchase are Motronic 4.3, so I'm good there. (Phew!) The only real discrepancy that remains for me: the tuned ECU might be coded for EGR equipment and I know my car does not have t...

RobertDIY! Thanks for responding to my post. I'm not 100% sure...but my best guess is that the ECU came from the factory in a '95 Turbo wagon.

Hope you're feeling better. Take good care!

Many thanks for the reply, bmdubya! Here's where I think all this is landing: I have a 97 HPT with emission code "2" in the VIN = no EGR and no SAS. I'm quite confident (despite conflicting info from seller) that the ECU is from a 95 HPT, hence emission code 1 = no SAS either, but it did c...

Many thanks to 101 for the reply. I really appreciate it because this older post (link pasted below) says it's normal for the fitting to be connected to nothing, which just seems odd to me. I'll have to look for a diagram related to this canister to see if I can figure things out. Suggestions most w...

Hi All, first-time poster here, writing from Denver with a question about swapping ECU's that I couldn't manage to answer entirely on my own...Thanks in advance for your assistance. I have a stock '97 850 T-5, VIN YV1LW5720V2293470. My ECU part number reads: 0 261 203 072 My numbers under the four E...